I have had a red circular spot, approx 1/2" on the front of my leg, above, the ankle for several weeks now. No pain, no itching, no swelling, not much of a discernible center. It has a crusty covering. I don't have ticks around and hardly go outside much. After 2 weeks I have started to develop some muscle and joint ache. I assumed at that point to be getting the flu, which I have had for a week now. Don't know what the spot is or if these recent symptoms are related. Any ideas?